convert mass to moles for both reactants. (round to 2 significant figures.) 2.50 g cucl₂ equals moles 0.50 g…

Answer:

For $2.50\ g$ of $CuCl_2$: $0.019$ moles For $0.50\ g$ of $Al$: $0.019$ moles

Explanation:

Step1: Calculate molar mass of $CuCl_2$

The molar mass of $Cu$ is approximately $63.55\ g/mol$ and of $Cl$ is approximately $35.45\ g/mol$. So for $CuCl_2$, $M = 63.55+2\times35.45=134.45\ g/mol$.

Step2: Convert mass of $CuCl_2$ to moles

Using the formula $n=\frac{m}{M}$, where $m = 2.50\ g$ and $M = 134.45\ g/mol$. So $n=\frac{2.50}{134.45}\approx0.0186\approx0.019$ moles.

Step3: Calculate molar mass of $Al$

The molar mass of $Al$ is approximately $26.98\ g/mol$.

Step4: Convert mass of $Al$ to moles

Using the formula $n=\frac{m}{M}$, where $m = 0.50\ g$ and $M = 26.98\ g/mol$. So $n=\frac{0.50}{26.98}\approx0.0185\approx0.019$ moles.